Keep the model alive and trusted.
The systems, processes and ownership that keep a cost model maintained, current and connected to decisions.
What is Costing Tools & Governance?
This dimension covers the systems, processes, and organisational structures that support ongoing cost and profitability management. It includes your choice of costing software, data pipelines, update frequency, model ownership, and how costing outputs are reviewed and acted upon.
An unmaintained model is useless.
Even the best cost model becomes useless if it's not maintained. Governance ensures that costing outputs are trusted, updated regularly, and connected to decisions. The right tools reduce the effort of maintaining the model and make insights accessible to the people who need them.
Where does your organisation stand?
Spreadsheets with no version control. Model owner-dependent. Updates rare or ad hoc.
Dedicated costing tool or structured Excel model. Annual update cycle.
Costing tool connected to ERP/BI data sources. Quarterly refresh. Clear ownership.
Automated data feeds, real-time or monthly refresh. Formal governance and review cadence.
Three moves toward lasting governance.
Audit your existing costing infrastructure - spreadsheets, ERP modules, BI tools. Identify gaps in automation, accuracy, and accessibility.
Assign clear ownership: who builds and maintains the model, who reviews outputs, who acts on insights. Document the review cadence.
Evaluate purpose-built costing tools like CostCtrl alongside ERP and BI options. Consider scalability, integration capability, and total cost of ownership.
Spreadsheet, ERP, or built for costing?
| Tool Type | TDABC Support | Data Integration | Scalable Governance |
|---|---|---|---|
| Spreadsheet-based | ✕ | ✕ | ~ |
| ERP Cost Module | ~ | ✓ | ✕ |
| Dedicated Costing Tool (CostCtrl) | ✓ | ✓ | ✓ |
How to govern a cost model so people trust it
A cost model fails not when it is wrong, but when no one believes it. The most accurate model in the world is useless if the sales director can wave it away with "I don't trust those numbers." Trust is not a feeling you earn with a good presentation; it is a property you build into the model through governance - so that any challenge can be answered with a fact, not an argument.
Each pillar answers a predictable challenge:
- Owner - "who is responsible for this?" One named person, not a committee, accountable for the model and its corrections.
- Method - "how was this calculated?" The activities, drivers and rates documented and open to inspection, not hidden in code.
- Audit trail - "where did this number come from?" Every figure drillable to the activity and document behind it.
- Refresh - "is this still current?" A fixed monthly cadence so the model never quietly goes stale.
This is the operational sibling of the Profitability Trust Score: the score rates how much to trust a number, and governance is how you earn a high one. A model with all four pillars gets acted on; a model missing any of them gets argued with.
